The compile-time calculation for `factor` overflows because `1<<31`
cannot be represented by `int`.  By casting to `uintmax_t` first, we
can avoid this overflow.

Closes #380

This assertion currently fails for S32 due to integer overflow (#380).

This emits the event even if PlayerControl::Play() is used to replay
the current song, which emits the missing "player" idle event.

Closes #381

Replaces the workaround from commit
751fff07 which fixed only one of many
crash locations.

See:

 https://github.com/MusicPlayerDaemon/MPD/issues/373
 https://github.com/android-ndk/ndk/issues/831
 https://bugs.llvm.org/show_bug.cgi?id=32611

Closes #373

Closes #360

In this new order, a filter 'AlbumArtist ""' matches only on songs
which neither have `AlbumArtist` nor `Artist`.

Grouping in the "list" command was completely broken from the start,
unlike "count group".  I have no idea what I have been thinking when I
wrote commit ae178c77, but it didn't
make any sense.

This commit is a rewrite of the feature.

For clients to be able to detect this feature, this commit also
increments the protocol version.

Be consistent with "list" responses.

Just like AlbumArtist falls back to Artist, AlbumArtistSort should
fall back tom AlbumArtist, ArtistSort and finally Artist.

Closes #355

This improves the workaround from commit
b5ba94f1 and actually gives a useful
result for "list" with a disabled tag.

Sometimes, the JVM returns a non-nullptr value with an exception
pending (seen on Android 1.6, maybe a Dalvik bug?).  Let's catch all
such cases.

Since nfs_stat_async is deprecated.

A Java object to send logs on the android side.

When using a database that was not created with a WebDAV music_directory
(i.e., if using a remote database, on which updates happen locally) and
using the Curl storage plugin, MPD would previously send GET requests that
had unescaped spaces in them.  This change uses Curl's URL-encode API to
solve this.

The number of MPD installs on Android < 5.0 is negligible, and that
API version introduces lots of useful features for MPD.

According to http://wiki.hydrogenaud.io/index.php?title=Cue_sheet FLAC
files should use the "WAVE" file type, but I recently encountered CUE
files declared as "FLAC" which could not be read by MPD.

Required according to RFC 3986:

> An implementation should accept uppercase letters as equivalent to
> lowercase in scheme names

Closes #330

This way, IsFileNotFound() can detect status 404.

Supports .mpdignore on NFS/SMB and others (closes #290).

Allows callers to extract the NFS error code.

See commit be137a19

Since 7d353bbe, _GNU_SOURCE is always
defined, which implies __USE_MINGW_ANSI_STDIO and thus switches to
the mingw implementations of the printf() family.  That's
standards-compliant, unlike Microsoft's CRT implementations.